<template>
<el-container class="home-container">
    <el-header>
        <div>
            <img src="../assets/logo.png" alt="">
            <span>电商后台管理系统</span>
        </div>
        <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <el-container>
        <el-aside :width="isCollapse?'64px':'200px'">
            <!-- 侧边栏 -->
             <div class="toggle-button" @click="toggleCollapse"><||></div>
            <el-menu background-color="#333744" text-color="#fff" active-text-color="#409eff" unique-opened :collapse="isCollapse" :collapse-transition="false" router :default-active="activePath">
                <!-- 一级菜单 -->
                <el-submenu :index="item.id+''" v-for="item in menuList" :key="item.id">
                    <template slot="title">
                        <i :class="iconObj[item.id]"></i>
                        <span>{{ item.authName }}</span>
                    </template>
                    <!-- 二级菜单 -->
                    <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/'+subItem.path)">
                        <template solt="title">
                            <i class="el-icon-menu"></i>
                            <span>{{ subItem.authName }}</span>
                        </template>
                    </el-menu-item>
                </el-submenu>
            </el-menu>
        </el-aside>
        <!-- 主体区 -->
        <el-main>
            <!-- 路由占位符 -->
            <router-view></router-view>
        </el-main>
    </el-container>
</el-container>
</template>

<script>

export default {
    data(){
        return {
            //左侧菜单数据
            menuList:[],
            iconObj:{
                '125':'el-icon-user-solid',
                '103':'el-icon-orange',
                '101':'el-icon-ship',
                '102':'el-icon-postcard',
                '145':'el-icon-data-analysis'

            },
            // 是否折叠
            isCollapse : false,
            // 被激活的链接地址
            activePath:''

        }
    },
    created(){
        this.getMenuList()
        this.activePath=window.sessionStorage.getItem('activePath')
    },
    methods: {
        logout() {
            window.sessionStorage.clear()
            this.$router.push("/login")
        },
        //获取所有的菜单
        async getMenuList(){
            const {data:res} = await this.$http.get('menus')
            if(res.meta.status !==200) return this.$message.error(res.meta.msg)
            this.menuList=res.data

        },
        //点击按钮折叠与展开
        toggleCollapse(){
            this.isCollapse= !this.isCollapse
        },
        // 保存链接的激活状态
        saveNavState(activePath){
            window.sessionStorage.setItem('activePath',activePath)
           this.activePath=activePath 
        }

    }
}
</script>

<style lang="less" scoped>
.home-container{
    height:100%;
}
.el-header{
    background-color: #373d41; 
    display: flex;
    justify-content: space-between;
    align-items: center;
    color:#fff;
    font-size: 20px;
    > div {
        img{
            height: 50px;
            transform: rotate(180deg);
            background-color: skyblue;
            border-radius: 5px;
        }
        span{
            margin-left: 20px;
        }
        display: flex;
        align-items: center;
    }
}
.el-aside{
    background-color: #333744;
    .el-menu{
        border-right: none;
    }
}
.el-main{
    background-color: #eaedf1;
}
.toggle-button{
    background-color: #4a5064;
    font-size: 12px;
    line-height: 24px;
    color:#fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
}
</style>